JPH064917Y2 - Piston type aerosol container - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Industrial Field of the Invention The present invention relates to a piston type aerosol container for separately storing a propellant and a content and injecting only the content without mixing them. Therefore, it is preferable that a propellant such as a drug or a caulking agent be mixed with the content, and the mixture is used for an aerosol product.

2. Description of the Related Art Conventionally, the following method has been used to manufacture a piston type aerosol container for separately storing a propellant and a content and injecting only the content without mixing the two.

First, the piston is inserted from the bottom of the container, which is the opening without the lower bottom wall. Then, after the lower bottom wall is wound around and fixed to the opening, the contents are filled from the container upper opening.

After filling the contents, the valve mechanism is fixed to the upper opening. Then, finally, the propellant is filled from the filling port of the lower bottom wall. After the filling of the propellant was completed, a completely separate rubber stopper was inserted into and fixed to the filling port.

However, the above-mentioned conventional method requires a lot of trouble to close the filling port with the closing plug after filling the propellant. Further, the rubber material is deteriorated with the passage of time, and a gas leakage accident or the like is likely to occur, and the appearance is bad.

The present invention is intended to solve the above problems. That is, when the propellant and the content are separately stored and the propellant is injected into the piston type aerosol container for injecting only the content without mixing the two, the propellant is filled and the filling port is closed. It is possible to do by a series of work.
Also, without using rubber or the like made of a material different from the container body,
The same type of material as the container body is used, enabling the filling port to be securely fixed with a stopper. In addition, the appearance is to be improved.

Means for Solving the Problems In order to solve the above problems, the present invention provides a valve mechanism at the opening to slidably mount a piston inside and a filling port for filling a propellant on a lower bottom wall. A synthetic resin container body provided with, and a distribution slit for propellant communication that communicates between the container body and the outside in a state where the container body is partially inserted into the filling port is formed in a part in the side surface axial direction. It is composed of a synthetic resin stopper provided, and the flow dividing groove of this stopper is stored in the container body by completely inserting and fixing the stopper in the container body. It consists of

Further, the complete insertion and fixing of the closing plug to the filling port provided on the lower bottom wall may be reinforced by welding and fixing the closing plug and the lower bottom wall by an ultrasonic welding method.

Further, the complete insertion and fixing of the closing plug to the filling port provided in the lower bottom wall may be reinforced by welding and fixing the closing plug and the lower bottom wall by a heat welding method.

Operation Since the present invention is constructed as described above, in order to form a piston type aerosol container, a container other than a propellant is provided on the opening side of the container body made of synthetic resin in which the piston is slidably mounted. After filling the contents, the valve mechanism is attached and fixed to the opening.

Next, a synthetic resin closure plug is inserted halfway in the axial direction into a filling port for filling the propellant, which is opened in the lower bottom wall of the container body, and temporarily fixed. This stopper plug is provided with a flow dividing groove for flowing the propellant in a part of the side surface up to the middle of the axial direction. Then, in the temporarily fixed state, the inside and outside of the container body are communicated with each other by the flow dividing groove.

In this state, a propellant filling nozzle is connected to the filling port to fill the container body with the propellant through the flow dividing groove. After this filling, the stopper is continuously driven into the filling port and completely inserted and fixed. By this complete insertion, the flow dividing groove is inserted into the container body, and cuts off the communication between the inside and the outside of the container body.

Next, a synthetic resin stopper and the lower bottom wall are ultrasonically welded,
Weld and connect by heat welding. By this welding and fixing, the closure plug made of synthetic resin and the lower bottom wall are integrated together, so that reliable sealing is possible and the appearance is also good.

In another embodiment, the container body is filled with the contents by connecting the valve mechanism to the opening and then filling the contents other than the propellant from the opened lower end without providing the lower bottom wall.
Next, after mounting the piston in the container body, the lower bottom wall is welded and fixed to the lower end of the container body. Then, after the closing plug is attached to the filling port of the lower bottom wall, the propellant may be filled by the same procedure as above.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. (1)
Is a container body and is made of a synthetic resin material such as polybutyl terephthalate, polyamide, or polyethylene terephthalate. Then, from the opening (2) to the lower bottom wall (3), by processing into a U-shaped cross section, the inner diameter is made the same and the lower bottom wall (4) for opening the filling port (4) for filling the propellant is formed. 3) is integrally molded.

Next, the piston (6) is slidably and airtightly mounted in the container body (1) through the opening (2). After the piston (6) is mounted, the contents other than the propellant are filled from the opening (2) of the container body (1) and the piston (6) is located above the piston (6). Then, after that, the valve mechanism (7) is connected and fixed to the opening (2).

This valve mechanism (7) is made of polyethylene, nylon, etc.
The upper surface of the housing (8) made of synthetic resin is covered with the lid (11) through the gasket (10). Also, insert one end of the stem (12) inserted into the housing (8) into the ridge (13).
Is pressed and urged from the outside by the so that the gasket (10) projects outward from the central portion.

Also, the housing (8) on the side opposite the protruding side of the stem (12).
The annular wall (14) is projected into the container, and the annular wall (14) is attached to the container body (1).
Is integrally fixed to the opening (2) by ultrasonic welding, heat welding or the like.

Next, a filling port (4) for filling the propellant, which is opened in the lower bottom wall (3) of the synthetic resin container body (1), has a stopper made of synthetic resin such as polybutyl terephthalate or polyamide (15). ) Is inserted.

As shown in FIG. 2, the synthetic resin stop plug (15) has a flow dividing groove (16) for flowing the propellant, which is provided in the axial direction of the side surface, not along the entire length but halfway. Further, in a direction located outside the lower bottom wall (3), a sealing portion (17) not provided with the flow dividing groove (16).
Is formed.

Then, insert the stopper plug (15) into the filling port as shown in FIG.
Insert in (4) halfway in the axial direction and temporarily fix. In this temporarily fixed state, it flows through the inside and outside of the container body (1) Split groove (16)
To communicate with each other. In this state, the filling nozzle (18) for the propellant is connected to the filling port (4) to fill the container body (1) with the propellant through the flow dividing groove (16).

Next, following this filling, as shown in FIG. 3, the closing plug (15) is driven into the filling port (4) with the driving rod (20), inserted and fixed, and fixed to the filling port (4). .

After this driving and fixing, as shown in FIG. 4, the ultrasonic transducer (21) is pressed against the stopper plug (15), and ultrasonic welding is performed.
The closure plug (15) made of a synthetic resin and the lower bottom wall (3) made of a synthetic resin are welded and connected to each other so as to be integrated with each other, thereby enabling reliable sealing.

Also, in another different embodiment, the container body of the contents is
For filling the (1), the valve mechanism (7) is connected to the opening (2). After this, from the lower end opened without providing the lower bottom wall (3),
Fill with contents other than propellant. Next, after mounting the piston (6), the lower bottom wall (3) is welded and fixed to the lower end of the container body (1), and the closing plug (15) is attached to the filling port (4) of the lower bottom wall (3). After mounting, the propellant may be filled by the same procedure as described above.

Effects of the Invention Since the present invention is configured as described above, it is possible to separately store the propellant and the content, and to inject only the content without mixing the two and to manufacture the piston type aerosol container. In addition, the filling of the propellant and the closing of the filling port can be performed by a series of operations.

Also, without using rubber or the like made of a material different from the container body,
By using the synthetic resin closure plug in the synthetic resin container body, both of them can be welded and fixed, and the closure plug and the filling port can be securely integrated. Therefore, unlike the case where the rubber material is used, gas leakage due to deterioration of the closure plug with time does not occur. Further, since the synthetic resin materials can be welded and fixed to each other, the appearance can be improved.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a sectional view of a container main body, FIG. 2 is an enlarged sectional view showing a filling state of a propellant into a filling port, and FIG. 3 is a stopper. FIG. 4 is a sectional view showing a state in which is injected into the filling port, and FIG. 4 is a sectional view showing a state of ultrasonic welding. (1) …… Container body, (2) …… Opening (3) …… Bottom wall, (4) …… Filling port (6) …… Piston, (7) …… Valve mechanism (15) …… Stopcock, (16) …… Distribution split groove

Claims (3)

[Scope of utility model registration request] 1. A container main body made of synthetic resin having a valve mechanism in an opening, a piston slidably mounted therein, and a filling port for filling a propellant in a lower bottom wall, and filling of the container main body. A weldable stopper made of synthetic resin, which is provided with a flow dividing groove for flowing a propellant that communicates the inside and the outside of the container body in a partly inserted state with a part made in the axial direction of the side surface, A piston type aerosol container characterized in that the flow dividing groove of the closure plug is dimensioned so as to be in a non-communication state with the outside in a state of being housed in the container body by completely inserting and fixing the closure plug into the container body. 2. The complete insertion and fixing of the closing plug to the filling port provided in the lower bottom wall is to reinforce by closing and fixing the closing plug and the lower bottom wall by ultrasonic welding. Piston type aerosol container. 3. The complete insertion and fixing of the closing plug to the filling port provided in the lower bottom wall is reinforced by welding and fixing the closing plug and the lower bottom wall by a heat welding method. Piston type aerosol container that does.